When Describing the Layers of the Earth Based on Differentiation

question 21

Multiple Choice

When describing the layers of the Earth based on differentiation due to density,the layer surrounding the core is the rocky _______ nearly 2,900 kilometres thick.

• A) mantle
• B) crust
• C) chondrule

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Definitions:

Trophic Level

A level in an ecosystem's food web characterized by organisms that share the same step in energy flow, such as primary producers or primary consumers.

Grazing Food Chain

Food chain in which energy is transferred from producers to grazers (herbivores).

Detrital Food Chain

Food chain in which energy is transferred directly from producers to detritivores.

Atmosphere

The layer of gases surrounding a planet or moon, held in place by gravity, essential for life on Earth.